Anchoring device



JUL 25, 1938 I s. A. GulBERsoN, 3D 2,105,392

ANCHORING DEVI CE Jan. 25, 1938. s. A. GUIBERSON, 3D 2,l06,392

ANCHORING DEVICE Filed Nov. 9e 1936 2 sheets-sheet 2 UNITED STATES'PATENT ori-ice Nononnvc DEVICE Samuel Allen (Sluibcrson,A III, Dallas, Tex., as-

signor to The Guberson Corporation, Dallas, Tex., a corporation oi' Delaware Application November 9, 1936, Serial No. 109,903

4 Claims. (Cl. 166-12) This invention relates to new and useful imupper mandrel I3 which are connected. by a provements inanchoring devices. coupling collar I4. The mandrels are connected One object of the invention is to provide anV in the tubing string by the usual coupling collars improved anchoring device particularly adapted I2', and it is the common practice to control the 5 fOr USS With the Usual Slips, 01 @ther gripping setting of the tool bysome means which is car- 5 means, of a well packer, or similar device. ried by the tubing and actuated by the motion An important `object of the invention is to cf said tubing. It is the purpose of this invenprovide an improved anchoring device which is tion to provide a simple anchoring device for simple in structure and which is constructed to controllingA the setting of the gripping means, 3o readily actuate the gripping means of a well such'as slips (not shown), which are commonly 10 packer, or similar device, which is lowered into used to hold the packers or other tools-.in a set a well casing and set in position therein. position in the well casing.

Another object of the invention is to provide As clearly shown in Figure 1,` the anchoring an improved anchoring device including the device is mounted on the lower mandrel I2, i5 usual spring assembly movably mounted on a while the packer or other tool, including the 15 mandrel, said assembly having a notch adapted gripping slips (not shown); is mounted thereto receive the lower endof a rib on said mandrel, above on the upper mandrel I3.. f' whereby the assembly and mandrel move as a -The anchoring device includes a ring I5, which unit on the down-stroka'with means for disenis slidably mounted on the mandrel I2 at its gaging said rib from the notch for permitting a lower end, being supported on the upper end of 20 downward movement of the mandrel with relathe lower coupling collar I2. This ring has the tion to the assembly, the structure oeing such flower ends o'f outwardly bowed or curved fricthat the usual spring assembly and mandrel may tion springs 'IB secured thereto in spaced relation be used, whereby manufacturing costs are mate'- therearound. The upper ends of said springs 25 rially reduced. are similarly secured to an upper control collar 2.-

A construction designed to carry out the inor sleeve Il. This control collar surrounds the vention will bev hereinafter described, together coupling Il and has an inside diameter greater with other features of the invention. than the outside diameter of said coupling, The invention will be more readily understood whereby the collar may freely pass thereover. @o from a reading of the following specification Three vfriction springs are shown, but any de- 30 Y and by reference to the accompanying drawings, sired number may be employed, and these in which an example of the invention is shown, -springs engage the walls of the casing -Ill and by and wherein: such frictional engagement prevent turning of Figure 1 is a view, partly in elevation and the spring assembly within the casing. 35 partly in section, of an anchoring device cony lillongates vertically extending lugs I8 and I9 3- structed in accordanceI with the invention and are secured to. and extend upwardly from the disposed within a well casing, upper end of the vring I5 ,and are spaced from Figure 2 is a similarv view taken at right angles eachother. [A shorter lug'20 also extends upto the -view shown in Figure l, wardly froml the ring. I5 and is positioned bee0 'FlgureB is a view, partly in section and partly tween the'elongate lugs at a point close to the 40 in elevation, ofthe device in position for operlug I8, whereby a vertical notch l is formed ating the slips or other gripping means (not therebetween. It is obvious that the side of theV shown), notch I8 formed by the elongate lug I8 is great- Figure 4 is a horizontal, cross-sectional view l er than that side formed by the shorter lug 20. 5 take'n on the line hlof Figure l, and The mandrel I2 is. provided with an elongate 45 Figure 5 is a horizontal, cross-sectional view rib or key ZI which is welded, or otherwise setaken on the vline 5-5 of Figure l. cured or formed, on the outer surface of said In the drawings, the numeral in designates mandrel andextends parallel to its axis. The the usual well casing within which the tubing lower end of the rib 'is spaced from the coupling co II extends. It is the common practice to place I2' and is adapted to engage in the notch I8' 50 certain tools, such as packers and the like, ,withformed between the lugs I8 and 20 whereupon lin the Well Casing at a desired Dfbint, and it fremovement of the mandrel is imparted to the ring quently becomes necessary to remove or to .-re- I5 and the spring assembly. When the rib is position these tools in the casing, These .tools engaged in the notch, Fas clearly shown in Fig- 5 ordinarily include a lower mandrel I2 and an A ure 1, the lower end of the ring I5 isspaced from 55 the upper end ofthe coupling I2' a distance slightly greater than the height of the shorter lug 20. It will be obvious, therefore, that, when the mandrel is moved upwardly, the lower end 5 of the rib will be raised above the upper end of the shorter lug 20 before the ring i5 engages the coupling and upon rotation of the mandrel the rib will move out of allnement with the notch I8". However, this space between the collar. i2' 10and lower end of the ring i5 is less than the height of the elongate lugs it and it, whereby the lower end of the rib, while clearing the top of the shorter lug t, will be confined between said elongate lugs. l5 An internal longitudinal slot or groove t2 is provided in the inner periphery of the ring l5 contiguous to one side of the other elongate lug it, whereby, .when the rib di is removed from the notch id' and rotated into engagement with the lugie, a downward movement of the mandrel will cause the loweiend ci said rib to be guided into the slot t. This permits downward movement of the mandrel with relation to the spring assembly, which is held stationary due to the frictional engagement of the springs le with the casing wall. Upon continued downward movement of the mandrel, the slips or other grip" ping means (not shown) which are supported upon the collar il are expanded in the usual manner and the tool is set. it is noted that the length of the rib 2i is such that the upper end thereof remains in constant engagement with the slot 22 as the gripping means (not shown? moves to its set position before said rib passes entirely through the slot.

When it is desired toreposition or remove the tool, it is only necessary to lift the mandrel until the lower end of the rib 2i is removed from the slot 22, whereupon the rib and mandrel may be rotated and said rib reengaged in the notch id'. With the mandrel in this position the slips `or other gripping means (not shown)v are moved thereby to their retracted position and the tool may be lifted from the well casing. It will be seen that the device is simple in structure and economical in manufacture since it is only necessary to mount the lugs i8, l and 20 on the ring i5 and to provide the groove 22 therein, and to secure the rib 2i on the mandrel i2. This structure obviates the necessity of having an additional sleeve, in which a J-slot of the usual type is formed, for operating the spring ng a ring surrounding the mandrel, elongate lugs on the ring for conning the rib within predetermined limits therebetween, a shorter lug on the ring adjacent one of the elongate lugs forming a notch therebetween for receiving the rib to connect the mandrel and assembly whereby they move downwardly as a unit, said ring having a, slot formed therein for receiving the rib `by they move downwardly as a unit, said ring having a slot formed therein for receiving the rib and adjacent the other elongate lug whereby when the rib has been disengaged from. the-notch and the mandrel rotated to engage said rib with this lug, said lng will act to guide the rib into said slot upon downward movement'of the mandrel.

3. An v`anchoring device including, e. mandrel, an elongate rib on the mandrel, a spring assembly slidably mounted' on the mandrel and including an upper ring andi a lower ring surrounding the mandrel and irlction springs connecting the rings, elongate lugs on the lower ring for confining the rib within predetermined llmits therebetween, a shorter lug on said ring adjacent one of the elongate lugs and forming a notch therebetween for receiving the rib to connect the mandrel and assembly whereby they `move downwardly as a unit, said lower ring also having a slot formed therein adjacent the other elongate lug and adapted to receive the rib whereby when the rib has been disengaged from the notch and the mandrel rotated to engage the rib with this lug, said lug will act to guide the rib into said. slot upon downward movement of the mandrel.

4. An anchoring device including a mandrel, a I

coniining the rib within predetermined limits j therebetween, a shorter lug on the ring between y said elongate lugs forming a notch between the shorter lug and one of the elongate 'lugs for re- 

